Graphical user interface for a display screen



The FIGURE is a front view of a graphical user interface for a display screen showing our new design.

The broken line showing of various regions is for illustrative purposes only and forms no part of the claimed design. The broken line showing the display screen is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a graphical user interface for a display screen, as shown and described. 